<!DOCTYPE html>
<html>
<head lang="en">
  <meta charset="UTF-8">
  <title></title>
  <style>
    div{
      width: 200px;
      height: 200px;
      margin:100px auto;
      background-color: green;
    }
    /*skew(x,y);  */
    div:hover{
      /*transform:skew(30deg,0deg);*/

      transform:skew(0deg,30deg);

      /*transform:skew(30deg,30deg);*/
    }
  </style>
</head>
<body>
    <div></div>
</body>
</html>